Why don't we consider all nucleophilic substitution reactions as electrophilic reactions and vice versa?
For example, look at this reaction I found in my textbook. (See picture)
This is an electrophilic substitution if we consider the H+ to be replaced by NO2+.
But if we look at it as the OH- ion being replaced by a CCl3- ion, then it can also be a nucleophilic substitution reaction! I'm so confused!
Any help on this would be greatly appreciated.